A 250 Turn reactangular coil of length 2.1 cm and width 1.25 cm carries a current of $85 \; \mu A$ and subjected to a magnetic field of strength 0.85 T. Work done for rotating the coil by $180^o$ against the torque is :

Question

( A ) $1.15 \mu J$
( B ) $4.55 \mu J$
( C ) $2.3 \mu J$
( D ) $9.1 \mu J$